peterson



Aug. 21,1928. Re. 17,068

J. PETERSON ELECTRIC CONNECTING PLUG Original Filed May 1924 1 16.1. I I fi a'q'.

Reissued Aug. 21, 1923.

Remote v UNITED STATES PATENT OFFICE.

JOHANN c. PETERSON, or WEST nanrronn; commcrrcnr. j

ELECTRIC CONNECTING I LUG.

' Original 17o. 1,537,689, dated May 12, 1925, Serial lfl'o. 712,036, filed May 9, 1924.

. filed September 22, 1926. Serial No. 137,142.

.This invention relates to an electric connecting plug, the principal object of the invention being to furnish an article of the nature set forth which is an improvement over the construction of a co-pending application, and is adapted for exceedingly inexpensive manufacture while maintaining its efiiciency and increasing its safety.

In the drawing accompanying and forming part of the present specification, I have shown a highly advantageous form of embodimentpf the invention, which, to enable those skilled in the art to practice the same, will be set forth fully in the following description. I am not restricted to this disclosure. I may depart therefrom in a number of particulars within the scope of the invention defined by theclaims following said description.

above. The body has fittedtojts inner end a side contact or shell 3 of screw type, which v shell has a flanged orbottom portion, as 3,

similar to that in my above mentioned application, fitted against the inner face flat wise of the body 2 in a well known manner.

Over the flanged bottom ,3 of the shell 3 fits a concentric thin flat insulating disc 8, preferably ofv fiber or other -non-brittle material,

while disposed concentrically with this disc and above the upper surface thereof is a central tubular, and preferably slightly conical, projection or outstanding hollow port-ion 7 which constitutes the central end contact of the plug, the'general construction being similar to that described in my above mentioned application, but the several'parts'herein being improved and held in place by improved and simplified means acting not only, to hold the central contact in position, but to clamptogether the several parts of the complete plug as hereinafter'brought out.

Herein the central contact 7 has an imperforate top, giving a more, smooth contact surface of greater-effectiveness and a larger sur- Application for reissue face particularly at its axis. Moreover, while the shape of the contact surface may be varied; the same herein has a flat surface, thereby providing a surface contact of substantial area. 'The contact 7 herein is also provided with laterally extendingmeans at its base, herein in the form of a flat annular base flange 5, providing an improved contact engaging surface the flange form of the same especially providing a large stable base and a more rigid. and strong central contact construction capable of being very cheaply produced and, due to it's symmetry, also very conveniently and cheaply assembled. Herein, it

will be noted that this flange 5 is provided with suitable perforations therein herein diametrically oppositely located re ative to the axis of the member 7 Also, short hollow rivets 6 of small diameter are seated in the end of the base 2 and extended upward therefrom through suitable perforations in the insulating disc 8 and these perforations in the flange 5. Thus, the rivets 6 operate not onlg to hold the disc 8 in position, but also, throng the cooperation of the flange 5, to hold the central contact 7 and all of the parts of the device in assembled relation clamped firmly to the base 2, as will hereinafter more fully appear. Herein, these rivets 6 are also insulated from the shell 3, an enlarged aperture 3 in the shell being provided through which the rivets 6 are passed, and the size of this aperture 3 being such as to cause the rivets to be substantially spaced from the shell and I tiiulsl to insulate the rivets efi'ectually from the s e The insulating disc 8 herein also has in it a slot 9, parallel to a line extending through both rivets 6 and laterally spaced therefrom with its ends equally spaced from said rivets.- This slot 9 is herein adapted .to receive the butt end of a contact 10 which, asrepresented, is-furnished with an inward right angled .ex tension 11 overlying the disc 8 and disposed between the same and the flange 5 on the con- ,tact 7. Thus, the butt end 11 of the contact 10 herein is also clamped between the two parts 7 and 8 by the same means which clamps the central contact 7 and the disc 8 to the body. Obviously, the length of this bent-over portion may be varied as desired so long as a proper clamping action, calculated to give a good electrical connection, is obtained. Prefer'ably,.however, as herein, the same is of such length as to extend across the axis of the contact 7 and underlie the flange 5 on opposite sides of the latter thereby insuring a better contact and a more strong and rigid construction.

Attention is also directed to the fact that the inner end of. the contact 10 is herein of improved form in longitudinal'section and disposed in a passage 13 of rectangular cross section and extending longitudinally of the body 2 beneath the slot 9 in the disc 8, as best illustrated in Fig. 5; the contact 10 herein being of substantially the width of the passage 13, and further, so bent between its ends as to provide a flat surface 10 engaging the outside wall of the passage 13 between other portions of the contact spaced from that wall, whilethe extremity of the contact enga es the opposite wall thereof.

farallel with the passage 13, but symmetrically disposed onthe opposite-side of the axis of the base 2, is also a similar passage 14: which receives a like contact 15 but hav- 1 ing a longer portion 15 engaging the outer wall of the passage 14 and extending in contact with that wall approximately to the; outer bent end 16 of the contact.

Herein, the outer end 16 of the contact 15 extends through a slot 12 in the base 3' of the con clamped in position when the parts are clamped together by the means other parts together.

It will also be noted that the body 2 and clamping the the shell 3 are locked against relative rotation by seating the depression 17 in a correspondingly shaped slot 18 formed inthe insulating disc associated therewith and ef- :Eecting other improvementsv enumerated above, the bent-over'end-11 of the contact 10 is eflectually separated from the contact 15and the shell 3 by the insulating disc'8, at. the same time that it is made possible to cause the same means used to hold .the hollow contact in operative relation to its cooperating contact, to perform the additional functions of holding both of the contacts and .all

- even the one larger rivet.

the process of assembly is simplified, my imand rigid construction which may also be made more cheaply. For example, all necessity for'providing or connecting a long hollow rivet of large diameter and extending to the top of the central contact, and also providing supplementary rivet means likewise embedded in the base, is eliminated, a single means instead being utilized and this single means being adapted to perform the entire clamping function. Further, through the use of the rivets 6 this single means can be furnished at a cost less than At the same time,

proved structure being connectible in a single quick operation and the use of the same making it unnecessary to utilize slower spinning operations.- In this connection, attention is directed to the fact that the clamping means is'so 'seated in t'hefla't end ef the rugged base and the other parts are so arranged with respect to the clamping means, base, and one another that the device may be riveted togcther in a press with such a minimum of breakage as to eliminate necessity for utilizing a slow spinning process. I also desire to call attention 'to the fact that the inner terminal end of the contact 15 extends into a depression in the bottom 3 of the shell 3, which in turn extends into one end of a corresponding depression extending across the end of the inner portion of the body 2, thus enabling thedepression in the shell to act as a key to prevent the shell fronrturning when the depression in the shell is at either end of the depression in the base, in such'a manner thatmanufacture is simplified and assembly expedited, no necessity now existing for 10- cating the shell in only one position with respect to the base. It should also be noted thatthe portions 10, -15 on thesi des of the contacts 10 and 15 engage solidly the rear or outer walls of the passages 13' and 14:, re-

spectively, which is-an important condition I in that a tension on the contacts is assured, the working ends of the contacts normally being pressed against the opposite walls in such manner as to'insure a proper contact with the cooperating removable contacts, not shown. 1

Attention is also directed to the fact that In this construction, as in my prior construction, it is still possible for the-central con tact of the plug to make contact with the central contact of the socket irrespective of the projection of the socket screws and to eliminate the possibility that these screws will contact with any central contact part and thereby cause a short-circuit, the boss herein being of such dimensions and construct'on as better to pass between the screws and, t rough the improved imperforate'conf the b the cooperati'n contactienga-ges this flange of the boss, a

tact surface provided, make an improved contact with the center contact of the plug, while my improved construction at the base oss is such as to be adequately spaced from these screws while obtaining other advantages. dent that by extending the lateral extension on the cooperating contact through the shallow disc and laterally outside the same beneath the boss, it is made possible to eliminate one rivet and simplify the central contact connections of my previous case, while also simplifying and shortening the cooperas compared with prior devices using high insulation and a low contact extending laterally across the plug closely adjacent its extremity. At the same time, due to the location of the lateral extension of the cooperating contact between the disc and the boss, and due to the clamping action of the dome or boss on this lateral extension, it is made possible for the lateral disc. F urther, enables the use of laterally boss and the lateral extension on on opposite si es of the axis plurality of such large contact surfaces is also presented and in any angular symmetrical boss, strengthens the b resulting from thisim rovement,- to enable the shell to be made of t would be hile I have in. this application specifically described 'oneform which my invention may assume in practice, it is to be understood that this form of my invention is shown for purposes of illustration and that the invention may be modified and embodied in various other formswithoutdeparting from its spirit or the scope of the appended claims.

Thus, for example, it will be 8Vl-' greater height than mg laterally tend I get tending through said 4.111 combination,

hat I claim as new and desire to secure by Letters Patent is In combination, an insulating base of substantially uniform diameter at'one end, a conducting shell on that end of the same, an insulating disc overlying the adjacent contact outside said disc and of substantially the latter, contacts in portions on opposite sides of said disc and including one extending through said disc and underlying said raised hollow contact and one engaging said shell, and means insulated from said shell clamping the bottom'of said raised hollow Contact in engagement also clamping all of the parts to said base.

insulating base of substantially uniform diameter at one end, a threaded conducting shell on-that end thereof, an insulating disc overlying the adjacent ends of said shell and central contact outside said tially greater said base having height than said disc and have'xtending means at its base, a contact member in said base having a portion extending through said disc i the same in contact with said-laterally exing means,

.3. In-combination, substantially uniform of, an insulating disc overlying the adjacent ends of said shell and ase, a raised hollow central contact outside said-disc of substantially greater-height than said disc, a contact member in said base-having a portion cxdisc and overlying the said bafse electrically connected with said shell,and means insulated 'from said shell clampin'g'the bottom of said raised hollow contact in engagement-With its cooperating contact and also ho ding all the parts to gethe'r. y

an insulating base of substantially uniform diameter at one end, a threaded conducting'shcll on that end there-.v of, an insulating disc-overlying the adjacent ends of'said shell and base, a raised hollow central contact outside said disc of substantially greater height than said. disc and having laterally extending means on its base, a contact member in said base having a'portion extending'through said disc and overlying the same in contact with said laterally extending means on opposite sides of theaxis with its cooperating contact and base, a raised hollow disc of substanof said base and shell, a raised hollow central d of saidhollow contact, a second contact in said base electrically connected with said shell, and a plurality of rivets carried by said base and insulated from said shell and extending through said disc and laterally extending means.

' 5. In combination, an insulating base of substantially uniform diameter at one end, a threaded conducting shell on that end thereof, a shallow insulating disc overlying the adjacent ends of said shell and base, a raised hollow central contact outside said disc and having a flange around its base a contact member in said base having a portion extending through said disc'and a lateral extension thereon in contact with said flange, a second contact in said base electrically connected to substantially uniform threaded conducting shell on that end thereof, an insulating disc gether.

.disc of substantially said shell, and means insulated from said shellclamping the flange on said raised hollow contact in engagement with its cooperating contact and also holding all the parts to- 6. In combination, an insulating base of diameter at one end, a

overlying the adjacent ends of said shell and base and of substantially the diameter of that end of the base, a raised hollow central contact outside said greater height than said disc and-having a flange around its base, a

contact member in said base having a portion extending through said disc and a lateral extension thereon iucontact With Said flange, a second contact in said base electrically connected to said shell, and a plurality of rivets.

carried by said baseand insulated from said shell and extending through said disc and flange. i

-7; Incombination, an-1nsulating base of substantially uniform diameter at one end, a

- shell, and means insulated tactin'g with threaded conducting shell on that end thereof, an insulating discoverlying' the adjacent ends of said base and shell, a raised hollow central contact outside said disc of substantially greater height than said disc and having .a

an 'insulating disc overlying the adjacentends of said base and shell,

a raised hollow central contact outside said flange around its base, a contact member in said base having a portion extending through same diameter as disc' of substantially .greater'height than said disc and having a said disc and a lateral extension thereon contacting with said flange on opposite sides of the axis of said raised contact, a second contact in said base electrically connected to said shell, and a plurality base and insulated from said shell and extending through said disc and flange.

9. In combination, an insulating base of substantially uniform diameter at one end, a

' threaded conducting shell on that end thereof having a top overlying said end, an insulating disc overlying the ad acent ends of said shell and base, a raised hollow central contact member outside said di:c of substantially greater height than said disc and presenting an imperforate cuter central contact surface, a contact member in said base electrically connectecl tothe top of said shell and insulated from said raised hollow central contact, and a second contact member in said base electrically connected to the bottom of said raised hollow central contact and insulated from said shell parts; i

.10..In combination, an insulating base'of substantially uni form diameter at one end, a thrc aded conducting shell on that end thereof,

an insulating disc overlying the adjacent ends of said shell and base and of substantially the that endof the latter, a raised hollow central contact member outside said disc of substantially greater height than said disc presenting an iinperforate outer central contact surface and having a flange aroundits base, a contact member in said base having a portion e; tending through said shell and disc and insulated from the former and having a lateral extension underlying said flange and lying flat on the outer surface of said. disc, electrically connected to said shell and insulated from said central contact parts.

base of 11. In combination, an insulating diameter at one end, a

substantially uniform threaded conducting shell on that end thereof,

an insulating disc overlying the adjacent ends of said shell and base and of substantially the same diameter as that end of the latter, a

raised hollow central contact member outside said disc of substantially greater height than said disc presenting an imperforate outer central contact surface and having a flange around its has' e,a contact member in said base insulated from said-shell and having a portion extendingthi'ough said disc and a lateral extension thereon'-underl.y in g said flange'and in engagement with. said flange on opposite sides of the axis of said hollow contact, and a --second contact in said base electrically con-' nected to said shell and insulated from said central contact parts.

12. In combination, an insulating base of substantially uniform of rivets carried by said and a second contact in said base Ill) resting flat on the outer surface of said disc diameter at one end, a threaded conducting. shell on that end thereof, a shallow insulating disc overlying the adjacent ends of said shell and base, a raised hollow central boss member outside said disc and having aperipheral flange around its base for stiifening both the disc and the boss and spaced substantially from the inner end of the boss and extending laterally over the shallow disc, a contact member in said base insulatedfrom said shell and having a portion extending through said disc and a lat.- eral extension underlying the flange on said boss and in contact therewith, a second contact in said base electrically connected to said shell and insulated from said central contact parts, and upstanding rivet means embedded in said base and insulated from said shell extending through 'said .disc and boss and holding all the parts in assembled relation.

' 13. In combination, a conducting shell having a depressed portion in its upper surface adapted to receive a lateral extension of a contact, and a coo crating insulating base received in said shel and having correspondingly depressed means in its end whereby said shell may be assembled thereon in a plurality of positions with said depressed portion on the shell so seated inthe correadapted to receive the depressed sponding' depressed means in said base as to prevent relative rotation, said last mentioned means including a transverse slot portion on said shell in either end thereof.

14. In combination, an insulating base hav ing contact apertures therein, a threaded conducting shell fitted over one end thereof and having a depressed portion, a center contact insulated from said shell, contact members in said apertures in the base. and connected to said shell and center contact, means for holding said center contact in contact with its cooperating contact also functioning to hold all the partsagainst longitudinal separation, and means independent of said last mentioned means but held in position, thereby for preventing relative rotation between said base and shell and including arecess 1n said base extendmg across "between the inner ends of said apertures and adapted to receive thereof.

15. A connecting plug comprising a body of-insulating material havingparallel passages therein, a threaded contact shell fitted over an end of the-bodyand having a portion engaging an end of the'body, an insulating disc fitting against "said shell portion,

two rivets embedded in said-end of the body and insulated from said shell extending through the shell and also through the disc, another conducting disc fitt'edagainst the other disc and perforated to receive said rivets, the rivets being extended through both discs and headed over on an outer face .of the outer disc, the latterv disc having a central end contact, and'two contacts fitted in' the said depressed portion in either end passages, one of which is electrically connected to said shell and the other to said central end contact. 1

16. A connecting plug comprising a body of insulating material having parallel passages therein, a threaded contact-shell fitted in the passages, one of which has a portion bent to engage the end portion of said shell while the other has a portion extending through a slot in the insulating disc and the insulating disc.

17. A connecting plug comprisinga body of insulating material having parallel bores, a threaded contact shell fitted over anend of bent to lie between the conducting disc and the body and having an end flange engaging an end of the body, an insulating disc fitting against the flange, the body having two hollow rivets embedded therein, extending through the shell and also through the disc, I

a conductingdisc fitted against'the other disc, perforated to receive said rivets, the rivets being extended through both discs and headed over the outer face of the outerdisc, the latter disc having a central end contact, and two contacts fitted in the respective bores, one of which has'a flange and said msulating disc, the other having a portion extending through a slot in the insulating disc and clamped by theconductin g disc to the insulating disc.

18. A connecting plug comprising a body of insulating material having parallel bores, a-threaded contact shell fitted over an end of thebody and having an end flange engaging flange and formed of insulating material, the body having two v hollow rivets embedded therein and extending ,through the shell and also through the disc, a conductingv outer disc fitting against the other disc. perforated to receive the rivets which extend through both discs andwhich are headed over the outer face of the outer disc, the latter having a central projection which is hollow'and which functionsas a central end contact, and two contacts fitted in the respective bores, one

ortion bent between the end an jend of the body, a disc fitted against the of which has a portion bent between the end flange and said insulating disc, theother having a portion-extending through a slot in the insulating disc and clamped by the conducting disc to the insulating disc.

, embedded therein, extending through the 19. A connecting plug comprising a body of insulating material having parallel bores,

' a threaded contact shell fitted over an end of the body and having an end flange engaging an end of the body, an insulating disc fitting against the flange, the body having two rivets shell and also through the disc, a conducting outer disc fitted against the other disc, the rivets being extended throrwhboth discs and headed over the outer surtace of the outer disc, the latter disc having a central end contact, and two resilient contacts fitted in the respective bores, one of which has a portion in contact with the end flange and said insulating disc, the other having a portion clamped-by the conducting disc against the insulating disc, the two contacts having re silient portions in contact with the outersurface of said bore's to stifien said resilient portions. i

20. An attachment plugcomprising an insulating body, a conducting shell seated thereon, a shallow insulating disc seated on the inner end of said shell, an outstanding central boss outside said disc forming a raised projection of smaller diameter than the disc and of substantially greater height than the latter at the axis of the disc, contacts projecting into said body insulated from one another and having lateral extensions each parallel to said disc and between said and boss and holding all the parts in assembled relation;

:In testimony whereof I aifix mysighature.

' JoH'AiIN e. TERSON. 

